纤维增强混凝土十字形柱中节点试验研究

Experimental study on seismic behavior of cross-shaped column interior joints reinforced by fiber concrete

本文通过对6个1/2缩尺的十字形柱中节点试件进行反复荷载试验,对比此类节点的破坏过程及破坏特点,分析滞回特征、位移延性、刚度退化、承载力、耗能能力,研究纤维对十字形柱中节点抗震性能的增强作用。试验研究表明:节点核心区使用纤维混凝土可以显著改善节点混凝土剥落状态、提高位移延性和承载力、减缓刚度退化。

Based on the cyclic loading tests on six cross-shaped column interior joints with a reduced scale of 1/2, the destructive progress and characteristics, hysteresis property, displacement ductility, rigidity degradation, bearing capacity and energy dissipation are compared in this paper to research the fiber reinforcement for the seismic behavior of the interior joints in cross-shaped column. It is shown in the test results that： using steel fiber reinforced concrete in the core area of the joint could significantly prevent the spalling of concrete, improve ductility and bearing capacity, slow down the stiffness degradation.